body {
    font-family: "微软雅黑", sans-serif;
    background-color: #040404;
    color: #fff;
    position: relative;
    background: transparent;
}

body::before {
    content: "";
    position: fixed;
    background: #040404 url("../images/bg.png") top center no-repeat;
    background-size: cover;
    left: 0;
    right: 0;
    top: 0;
    height: 100vh;
    z-index: -1;
}

main {
    text-align: center;
}

button {
    border: none;
    background: none;
}

button:focus {
    outline: none;
}

.container {
    position: relative;
    height: 100vh;
}

.guide-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    text-align: center;
    z-index: 2;
    background: rgba(0, 0, 0, 0.2);
}

.guide {
    width: 100%;
    height: 80px;
    padding-top: 40px;
    display: flex;
    justify-content: right;
    position: relative;
    padding-right: 83px;
}

.guide .text {
    color: #FFFFFF;
    text-align: right;
}

.guide .browser {
    width: 40px;
    height: 40px;
    margin-left: 10px;
}

.guide .jiantou {
    position: absolute;
    width: 63px;
    height: 57px;
    top: 10px;
    right: 10px;
}

.iknow-btn {
    margin: 26px auto 0;
    color: #FFFFFF;
    width: 118px;
    height: 39px;
    border: 1px solid #FFFFFF;
    border-radius:10px;
}

.logo{
    position:absolute;
    width:150px;
    height:150px;
    top:200px;
    transform: translate(-50%);
    left: 50%;
    border-radius: 25%;
}

.btn-container {
    position: absolute;
    top: 70vh;
    left: 0;
    width: 100%;

}

#download {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 210px;
    height: 42px;
    font-size: 18px;
    border-radius: 5px;
    color: #FFFFFF;
    border: 1px solid #FFFFFF;
    text-decoration: none;
    margin:0 auto;
}

@media (max-width: 992px) and (orientation: landscape) { 
    .logo{
        top:50px;
        width:100px;
        height:100px;
    }
 }